{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "The structure of tsukubachelin B ( 1 ) comprises 6 mol of amino acids , including 2 mol of serine and 1 mol each of ornithine , N - alpha - methyl - N - delta - hydroxy - N - delta - formylornithine , N - alpha - methyl - N - delta - hydroxyornithine , and cyclic N - hydroxyornithine ."}
{"Chemical": ["tsukubachelin B", "amino acids", "serine", "ornithine", "N - alpha - methyl - N - delta - hydroxy - N - delta - formylornithine", "N - alpha - methyl - N - delta - hydroxyornithine", "cyclic N - hydroxyornithine"]}